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TROUBLESHOOTING CIRCUIT MALFUNCTIONS - Continued
TROUBLESHOOTING CIRCUIT MALFUNCTIONS - Continued

Technical Manual For Hydraulic Excavator Model 330Lcr 1
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TM 5-3805-281-24-1
System Information
9015
05
11
A--Fuse (Power Side)
D--Switch Terminal
G--Component Terminal
B--Fuse (Circuit Side)
E--Wire Terminal
H--Load (Light)
C--Switch
F--Grounded Circuit
I--Ground
between fuse and switch. Inspect wire harness for
Grounded Circuit:
burned areas or insulation rubbed off a wire.
4. If continuity is not measured, measure continuity to
1. A grounded circuit results in no component
frame ground, between switch terminal (D) and
operation and the fuse blown or circuit breaker
component terminal (G).
open.
5. If continuity is measured, the malfunction is
2. Troubleshoot a grounded circuit by turning the
between switch and component. Inspect wire
switch OFF, and checking continuity to frame
harness for burned areas or insulation rubbed off a
ground between the fuse circuit side (B) and switch
wire.
(C).
3. If continuity is measured, the malfunction is
Continued on next page
CED,TX13067,2 1903FEB993/6
4-11


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